SEC Form 4 · accession 0001829064-26-000008
OLD SECOND BANCORP INC · OSBC
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
Reporting owner
Billy J Lyons Jr.
Director
Period of report
Aug 10, 2026
Accepted (ET)
Aug 11, 2026 · 12:47 pm EDT
Rule 10b5-1 plan
box not checked
Issuer CIK
0000357173
Table I — non-derivative securities
| Security | Date | Code | Shares | Price | A/D | Owned after | D/I | Nature of ownership |
|---|---|---|---|---|---|---|---|---|
| Old Second Bancorp, Inc. Common StockF1 | Aug 10, 2026 | A | 20 | $25.38 | A | 20,117 | D | |
| Restricted Stock Units | holding | — | — | — | 10,595 | D |
Table II — derivative securities
No Table II lines on this filing.
Explanation of responses
- F1Included in this total are 8,687 shares held with a broker and 11,430 shares held in Mr. Lyons' name outright.